JP2017111949A - Crimp terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve water cut-off performance.SOLUTION: A terminal metal fitting 10 includes a terminal connecting part 11 and an electric wire connecting part 12. The electric wire connecting part 12 is sectioned into a bottom part 14, a first barrel piece 15 and a second barrel piece 16 and is sectioned into a core wire crimp part 12A, a sheath crimp part 12B and a coupling crimp part 12C. A water stop member 20 affixed to the inner wall surface of an electric wire connecting part before execution of crimping processing forms, after completion of the crimping processing, a first water stop area 21 which suppresses intrusion of water from between the outer wall surface of the first barrel piece and the inner wall surface of the second barrel piece, a second water stop area 22 which suppresses the intrusion of water from the terminal connection part side of the tip position of a core wire 51, and a third water stop area 23 which suppresses the intrusion of water from between the inner wall surface of the sheath crimp part and a sheath 52. On the inner wall surface of the tip 15a of the first barrel piece in the sheath crimp part, a tapered surface 15ais provided whose plate thickness is thinned from the bottom side to the end surface side. A part of the third water stop area is connected with the end surface side at the tip of the first barrel piece between the inner wall surface side and the outer wall surface side.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a crimp terminal.

  DESCRIPTION OF RELATED ART Conventionally, the crimp terminal provided with the electric wire connection part electrically connected with the core wire of an electric wire is known. The crimp terminal and the electric wire are crimped by a terminal crimping device, so that they are electrically connected to each other. Here, in this type of crimp terminal, it is required to prevent water from entering between the electric wire connecting portion and the core wire of the electric wire. For example, in the techniques of Patent Documents 1 and 2 below, a water stop portion that closes a gap between the barrel piece and the electric wire is provided. The water stop portion is formed by attaching a water stop sheet made of a material such as butyl rubber to the inner surface of the barrel piece, and caulking the electric wire set on the water stop sheet with the barrel piece. In the techniques of Patent Documents 3 and 4 below, an insulating resin layer (insulating coating portion) such as polyethylene or butyl rubber is formed instead of the water-stop sheet, and this insulating resin layer is added to the barrel piece. It becomes a water stop after tightening.

JP 2014-182957 A JP 2014-182958 A JP 2014-160591 A JP 2012-69449 A

  By the way, as a structure of caulking with respect to an electric wire sandwiched between two barrel pieces, as described in Patent Documents 1 and 2, one barrel piece (inner barrel piece) is crimped while being wound around the electric wire. And the thing of the form which crimps | compresses while the other barrel piece (outside barrel piece) winds around one barrel piece with an electric wire is known. In such a caulking structure, a space is formed between the outer barrel piece and the coating on the end face side of the tip of the inner barrel piece. And depending on the volume of the space, there is a possibility that the water stoppage of the electric wire connecting portion is lowered.

  Then, this invention makes it the objective to provide the crimp terminal which can improve the water stop in an electric wire connection part.

  In order to achieve the above object, the present invention provides a terminal connection portion that is electrically connected to the counterpart terminal, and is electrically connected by crimping to the end of the electric wire placed on the inner wall surface side. An electric wire connecting part, and a connecting part for connecting the terminal connecting part and the electric wire connecting part, and the electric wire connecting part is a bottom part on which an end of the electric wire is placed during the crimping process, An inner first barrel piece extending from one end of the bottom and wound around an end of the electric wire, and an end of the electric wire extending from the other end of the bottom longer than the first barrel piece. And a core wire crimping portion that is divided into an outer second barrel piece that is wound around the first barrel piece, and that is crimped to the core wire at the tip of the electric wire, a coated crimping portion that is crimped to the coating of the wire, and the core wire The crimping part and the coated crimping part are connected and the wire A terminal fitting partitioned into a connection crimping portion to be crimped to the portion, and an outer wall surface of the first barrel piece portion that is affixed to the inner wall surface of the electric wire connection portion before the crimping process and after the crimping process is completed A first water stop region for preventing water from entering between the wire connecting portion and the core wire from between the inner wall surface of the second barrel piece and the terminal connecting portion rather than the tip position of the core wire A second water stop region for preventing water from entering between the electric wire connecting portion and the core wire from the side, and the electric wire connecting portion from between the inner wall surface of the covering crimping portion and the covering, and the A water stop member that forms a third water stop region that suppresses water from entering between the core wires. The inner wall surface at the tip in the extending direction of the first barrel piece in the covering crimping portion has a tapered surface whose plate thickness decreases from the bottom side toward the end surface of the tip. A part of the three water-stopping regions is connected to the end surface side of the front end of the first barrel piece, the inner wall surface side, and the outer wall surface side.

  Here, the second barrel piece portion has a plate thickness of a portion adjacent to the space between the second barrel piece portion and the coating on the end face side of the tip of the first barrel piece portion, rather than the periphery thereof. It is desirable to make it thinner.

  Further, the inner wall surface side of the second barrel piece portion in the covering crimping portion has an end surface side between the portion adjacent to the space and the end surface of the tip in the extending direction of the second barrel piece portion. It is desirable to provide a tapered surface whose thickness becomes thinner as it goes toward.

  In the crimp terminal according to the present invention, the capacity of the space between the second barrel piece part and the coating on the end face side of the tip of the first barrel piece part is reduced, and the filling amount of the water stop member into the space is reduced. The filling efficiency of the water stop member into this space is increased, and this space is easily filled with the water stop member. Therefore, this crimp terminal can improve the water stoppage between the second barrel piece and the coating.

Drawing 1 is a perspective view showing a crimp terminal of an embodiment, and represents a state before being connected to an electric wire. FIG. 2 is a side view showing the crimp terminal according to the embodiment, and shows a state in which the wire connecting portion is formed in a U-shape. FIG. 3 is a perspective view showing the crimp terminal after completion of crimping in the embodiment. FIG. 4 is a side view showing the crimp terminal after completion of crimping in the embodiment. FIG. 5 is a perspective view showing the terminal fitting of the crimp terminal according to the embodiment, and shows a state before the water-stopping member is attached. FIG. 6 is a top view showing the terminal fitting of the crimp terminal according to the embodiment, and shows a state after the waterproofing member is stuck. FIG. 7 is a view showing a cross-sectional portion of the wire connecting portion cut along line Y1-Y1 in FIG. FIG. 8 is a diagram showing a cross-sectional portion of the wire connecting portion cut along line Y2-Y2 in FIG. FIG. 9 is a diagram showing a cross-sectional portion of the wire connecting portion cut along line Y3-Y3 in FIG. FIG. 10 is a diagram illustrating the terminal chain. FIG. 11 is a diagram illustrating the terminal crimping apparatus according to the embodiment. FIG. 12 is a perspective view illustrating the first and second molds of the embodiment. FIG. 13 is a diagram showing a crimping process of a portion cut along line Y3-Y3 in FIG.

  Hereinafter, an embodiment of a crimp terminal according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

[Embodiment]
One embodiment of the crimp terminal according to the present invention will be described with reference to FIGS.

  Reference numeral 1 in FIGS. 1 to 4 indicates a crimp terminal of the present embodiment. The crimp terminal 1 is electrically connected to the electric wire 50 and is electrically connected to a mating terminal (not shown) while being integrated with the electric wire 50. Here, at the end of the electric wire 50, the coating 52 is peeled off by the length of the core wire 51 so that the core wire 51 is exposed for a predetermined length. The core wire 51 may be an assembly of a plurality of strands or a single wire such as a coaxial cable. The crimp terminal 1 is crimped to the end portion of the electric wire 50 in order to be electrically connected to the electric wire 50, thereby exposing the exposed core wire (hereinafter, simply referred to as “tip wire”) 51. Are electrically connected to each other.

  Specifically, the crimp terminal 1 includes a terminal fitting 10 and a water stop member 20.

  The terminal fitting 10 is a main part of the illustrated crimp terminal 1. The terminal fitting 10 is formed into a predetermined shape that can be connected to the mating terminal or the electric wire 50 by punching or bending a conductive metal plate (for example, a copper plate) as a base material. As shown in FIG. 5, the terminal fitting 10 includes a terminal connection portion 11 that is electrically connected to the mating terminal, and a wire connection portion 12 that is electrically connected to the electric wire 50. . The terminal connection part 11 and the electric wire connection part 12 are connected by a connection part 13 interposed between them.

  The terminal fitting 10 may be a male terminal or a female terminal. When the terminal fitting 10 is a male terminal, the terminal connecting portion 11 is molded into a male mold, and when the terminal fitting 10 is a female terminal, the terminal connecting portion 11 is molded into a female mold. In this embodiment, a female terminal is taken as an example.

  Here, in this crimp terminal 1, the connection direction (insertion direction) with the counterpart terminal is defined as a first direction L as a longitudinal direction. In addition, a parallel arrangement direction of the crimp terminals 1 to be described later is defined as a second direction W as a width direction of the crimp terminals 1. Further, in the crimp terminal 1, a direction perpendicular to the first direction L and the second direction W is defined as a third direction H as a height direction.

  The wire connection portion 12 is first formed into a single plate shape (FIG. 5), and after being subjected to predetermined processing described later, it is formed into a U shape as a state immediately before connection to the wire 50. (FIG. 1). And this electric wire connection part 12 is crimped | bonded to the edge part of this electric wire 50 by being wound around the said electric wire 50 in the state in which the edge part of the electric wire 50 was mounted, and contacts the core wire 51 of the front-end | tip.

  This electric wire connection part 12 can be divided into the area | region of the bottom part 14, the area | region of the 1st barrel piece part 15, and the area | region of the 2nd barrel piece part 16 (FIG.1 and FIG.6). The bottom part 14 is a part that becomes the bottom wall of the U-shaped electric wire connection part 12, and the end part of the electric wire 50 is placed in the crimping process. The first and second barrel pieces 15 and 16 are portions serving as side walls of the U-shaped wire connecting portion 12, and extend to both ends of the bottom portion 14 in the second direction W, respectively. In the U-shaped electric wire connecting portion 12, first and second barrel pieces 15 and 16 extend from both ends of the bottom portion 14 so as to surround the end portion of the electric wire 50.

  The first barrel piece 15 and the second barrel piece 16 may be formed such that the distances from the base on the bottom 14 side to the end surfaces of the tips 15a and 16a are the same length. May be formed so that the other is longer. In the present embodiment, the latter is illustrated. For this reason, as for each front-end | tip 15a, 16a in the 1st and 2nd barrel piece parts 15 and 16, in the U-shaped electric wire connection part 12, the other protrudes in the 3rd direction H rather than one. In this illustration, the second barrel piece 16 extends from the bottom 14 longer than the first barrel piece 15 (FIGS. 5 and 6). Moreover, the 1st barrel piece part 15 and the 2nd barrel piece part 16 are formed as what is wound around the edge part of the electric wire 50, mutually overlapping. For this reason, in this electric wire connection part 12, after completion | finish of crimping | compression-bonding (henceforth "after crimping completion"), the area | region (henceforth the following) where the 1st barrel piece part 15 and the 2nd barrel piece part 16 have overlapped. , Referred to as “overlap region”) (FIGS. 7 to 9). Specifically, the overlap region is a region where the outer wall surface of the first barrel piece 15 and the inner wall surface of the second barrel piece 16 face each other after completion of the crimping. That is, in this electric wire connection part 12, the 1st barrel piece part 15 turns into a barrel piece part wound around the edge part of the electric wire 50 inside, and the 2nd barrel piece part 16 is the barrel wound around the edge part of the electric wire 50 outside. It becomes one part. Therefore, at the time of crimping, the first barrel piece 15 is wound around the outer peripheral surface of the end portion of the electric wire 50, and the end portion of the electric wire 50 and the first barrel piece portion 15 in this state are covered from the outer peripheral surface side. Thus, the second barrel piece 16 is wound. In the electric wire connection portion 12, the first barrel piece 15 and the second barrel piece 16 are crimped to the end of the electric wire 50 in this way.

  Here, the end of the electric wire 50 is inserted into the U-shaped inner space from the U-shaped opening side of the electric wire connecting portion 12 (the opening formed between the end surfaces of the respective tips 15a and 16a). For this reason, as for the electric wire connection part 12, as it goes to the opening side (front-end | tip 15a, 16a side) from the bottom part 14 side so that the edge part of the electric wire 50 can be inserted easily, the 1st barrel piece part 15 and the 2nd barrel piece part. The interval of 16 is widened.

  Furthermore, this electric wire connection part 12 can be divided into the area | region of 12 A of core wire crimping | compression-bonding parts, the area | region of 12 C of covering crimping | compression-bonding parts, and the area | region of 12 C of connection crimping | compression-bonding parts (FIGS. The core wire crimping part 12 </ b> A is a part that is crimped to the core wire 51 at the tip, and is connected to the connecting part 13. The coating crimping part 12B is a part that is crimped to the coating 52 that continues to the root of the exposed portion of the core wire 51 at the tip. The connection crimping part 12 </ b> C is a part that connects the core crimping part 12 </ b> A and the covering crimping part 12 </ b> B and crimps it to the end of the electric wire 50.

  The wire connecting portion 12 is provided with a core wire holding region (hereinafter referred to as “serration region”) 17 for holding the core wire 51 at the crimped end on the inner wall surface (the wall surface covering the electric wire 50). (FIGS. 5 and 6). The serration region 17 is disposed at least in a portion of the inner wall surface of the wire connection portion 12 that is wound around the core wire 51 at the tip. The illustrated serration region 17 is formed so as to entirely cover the core wire 51 at the tip. Specifically, the serration region 17 of the present embodiment is a plurality of concave portions, a plurality of convex portions, or a combination of a plurality of concave portions and convex portions arranged in a rectangular shape, and the wire connection portion is formed by the concave portions or the convex portions. The contact area between 12 and the core wire 51 at the tip is increased, and the adhesion strength between them is increased. In this example, a rectangular serration region 17 is formed by a plurality of recesses 17a.

  Here, the electric wire connection part 12 and the core wire 51 at the front end need to be electrically connected to each other. For this reason, intrusion of water in the meantime is not preferable because durability may be lowered. For example, when the wire connection portion 12 and the core wire 51 are formed of different kinds of metal materials (copper and aluminum, etc.) having different ionization tendencies, in particular, the aluminum side may corrode due to water intrusion therebetween. There is sex. In view of this, the crimp terminal 1 is provided with a water stop member 20 for preventing water from entering between the wire connecting portion 12 and the core wire 51 at the tip (FIGS. 1 and 6). The water blocking member 20 is formed in a sheet shape mainly composed of a pressure sensitive adhesive such as a modified acrylic pressure sensitive adhesive. For example, as the water stop member 20, a sheet-like nonwoven fabric is used so as to have a pressure-sensitive adhesive soaked on both sides of the sheet. In addition, the water stop member 20 does not need to dare to provide, for example, when the electric wire connection part 12 and the core wire 51 are shape | molded with the same kind of metal materials (copper etc.).

  The water stop member 20 forms first to third water stop regions 21, 22, and 23 after the completion of pressure bonding (FIGS. 7 to 9). In order to embody the arrangement of the first to third water-stop regions 21, 22, and 23, the water-stop member 20 is formed in a predetermined shape and then the inner wall surface of the flat wire connection portion 12 shown in FIG. Paste to.

  The first water stop region 21 is a structure in which the water stop member 20 is interposed between at least the outer wall surface of the first barrel piece 15 and the inner wall surface of the second barrel piece 16 after completion of the pressure bonding (that is, the overlap region). (FIG. 7 to FIG. 9), and is a region that suppresses the intrusion of water between the electric wire connecting portion 12 and the core wire 51 at the tip. Therefore, the first water stop region 21 extends between the terminal connecting portion 11 side from the tip position of the core wire 51 at the tip and the covering 52 side from the root of the core wire 51 at the tip. This 1st water stop area | region 21 is formed of the 1st water stop part 24 of the water stop member 20 (FIG. 6).

  The first water stop 24 is located between the distal end 16a side and the bottom 14 side of the second barrel piece 16 from the distal end position of the distal end core wire 51 and from the base of the distal end core wire 51 to the terminal connection portion 11 side. Is also arranged between the side of the covering 52. The bottom 14 side of the first water stop 24 extends to a position that covers the second barrel piece 16 side of the serration region 17. Therefore, the illustrated first water stop region 21 is not limited to the overlap region, and the second barrel piece portion is within a range that does not hinder the electrical connection between the second barrel piece portion 16 and the core wire 51 at the tip. 16 is also formed between the inner wall surface 16 and the core wire 51 at the tip (FIG. 8).

  The 2nd water stop area | region 22 is an area | region where the water stop member 20 was filled by the terminal connection part 11 side rather than the front-end | tip position of the core wire 51 of the front-end | tip in the inside of the electric wire connection part 12 after crimping completion (FIG. 7) This is a region that suppresses the intrusion of water between the wire connecting portion 12 from the terminal connecting portion 11 side and the core wire 51 at the tip. This 2nd water stop area | region 22 is mainly formed of the 2nd water stop part 25 of the water stop member 20 (FIG. 6).

  The second water stop 25 is located between the tip 15 a side of the first barrel piece 15 and the first water stop 24 and the terminal connecting portion 11 side and the core 51 of the tip from the tip position of the core 51 of the tip. It is arranged across the tip part side of the. The illustrated second water stop portion 25 is disposed so as to cover the tip portion of the core wire 51 at the tip. For this reason, the illustrated second water-stop region 22 is also covered with the water-stop member 20 (second water-stop portion 25) at the tip portion of the core wire 51. In addition, the illustrated second water stop portion 25 is connected to the first water stop portion 24. For this reason, this 2nd water stop area | region 22 of this example is connected to the 2nd water stop part 25 and the connection part (the bottom part 14 side rather than an overlap area | region) with the 2nd water stop part 25 in the 1st water stop part 24. , Is formed by.

  The 3rd water stop area | region 23 is an area | region which interposed the water stop member 20 between the inner wall surface of the electric wire connection part 12 (specifically coating crimping | compression-bonding part 12B) after crimping completion, and the coating | coated 52 ( FIG. 9) is a region that suppresses intrusion of water between the electric wire connecting portion 12 and the core wire 51 at the tip from that point. This 3rd water stop area | region 23 is mainly formed of the 3rd water stop part 26 of the water stop member 20 (FIG. 6).

  The 3rd water stop part 26 is arrange | positioned between the front-end | tip 15a side of the 1st barrel piece part 15 and the 1st water stop part 24, and the part wound around the coating | coated 52 in the electric wire connection part 12. FIG. The illustrated third water stop 26 is connected to the first water stop 24. For this reason, this third water stop region 23 includes a third water stop portion 26 and a connecting portion of the first water stop portion 24 with the third water stop portion 26 (on the bottom 14 side of the overlap region). , Is formed by.

  The water stop member 20 is formed as the first to third water stop regions 21, 22, 23 in a connected state after the completion of crimping by arranging the shape of the water stop member 20 on the inner wall surface of the electric wire connecting portion 12. The The first to third water-stopping regions 21, 22, and 23 block communication between the end of the electric wire 50 and the outside in the electric wire connecting portion 12. Therefore, the water blocking member 20 can suppress the intrusion of water between the electric wire connecting portion 12 and the core wire 51 at the tip.

  The terminal fitting 10 shown above is processed into a form having a flat wire connecting portion 12 shown in FIG. 5 through a pressing process for one metal plate as a base material. The water stop member 20 is affixed to the flat wire connection part 12. Thereafter, the terminal fitting 10 is formed with the terminal connection portion 11 and the U-shaped wire connection portion 12 in the bending step.

  The crimp terminal 1 that has undergone the above-described steps is formed as a chained body (hereinafter referred to as “terminal chained body”) 30 (FIG. 10). The terminal chain 30 refers to an assembly of a plurality of crimp terminals 1 that are arranged in parallel at equal intervals in a state where they are directed in the same direction and are connected in a chain. In the terminal chain 30, one end of all the crimp terminals 1 is connected by a connecting piece 31. The connecting piece 31 is formed in, for example, a rectangular plate shape, and is arranged with a predetermined interval with respect to the wire connecting portions 12 of all the crimp terminals 1. The bottom part 14 of the electric wire connection part 12 and the connection piece 31 are connected to each crimp terminal 1 through, for example, a rectangular plate-like connection part 32. Through holes (hereinafter referred to as “terminal feed holes”) 31 a for feeding the terminal chain 30 to the crimping position of the terminal crimping device 100 are formed in the connecting piece 31 at equal intervals along the feed direction of the terminal chain 30. Is formed. The terminal chain 30 formed in this way is arranged in the terminal crimping apparatus 100 in a state of being wound in a reel shape (not shown). The crimp terminal 1 is separated from the terminal chain 30 after being crimped to the electric wire 50.

  The terminal crimping apparatus 100 will be described.

  As shown in FIG. 11, the terminal crimping device 100 includes a terminal supply device 101 that supplies the crimping terminal 1 to a predetermined crimping position, a crimping device 102 that crimps the crimping terminal 1 to the electric wire 50 at the crimping position, and a terminal supply. And a driving device 103 for operating the device 101 and the crimping device 102. The terminal supply device 101 and the crimping device 102 are devices called applicators in this technical field.

  The terminal supply device 101 pulls out the first crimp terminal 1 on the outer peripheral side of the terminal chain 30 wound in a reel shape, and sequentially supplies it to the crimp position. The terminal supply device 101 supplies the first crimp terminal 1 to the crimp position after finishing crimping the crimp terminal 1 to the electric wire 50 and cutting from the terminal chain 30. In the terminal supply device 101, the operation is sequentially repeated every time the crimping process and the cutting process are performed.

  This terminal supply device 101 has a configuration well known in this technical field, and drives the terminal feed member 101a by the power of the terminal feed member 101a inserted into the terminal feed hole 31a of the connecting piece 31 and the drive device 103. Power transmission mechanism 101b. The power transmission mechanism 101b is configured as a link mechanism that interlocks with the crimping operation of the crimping apparatus 102 (the vertical movement of a ram 114A or the like described later). The illustrated terminal supply device 101 supplies the crimping terminal 1 to the crimping position by driving the terminal feed member 101a in the vertical direction and the horizontal direction in conjunction with the crimping operation of the crimping device 102.

  The crimping device 102 performs the crimping of the supplied crimping terminal 1 to the electric wire 50 and the separation of the crimping terminal 1 from the terminal chain 30. For this reason, the crimping apparatus 102 includes a crimping machine 110 and a terminal cutting machine 120.

  The crimping machine 110 is a device that crimps the crimp terminal 1 to the electric wire 50 by crimping the crimp terminal 1 supplied to the crimping position to the end of the electric wire 50. In the illustrated crimping machine 110, the first barrel piece 15 and the second barrel piece 16 in the crimp terminal 1 are respectively crimped to the core wire 51 and the covering 52 at the tip end of the electric wire 50, thereby fixing the crimp terminal 1. Crimp to the electric wire 50. The crimping machine 110 includes a frame 111, a first mold 112 and a second mold 113 that are paired with each other, and a power transmission mechanism 114.

The frame 111 includes a base 111A, an anvil support body 111B, and a support body for power transmission mechanism 114 (hereinafter referred to as “transmission section support body”) 111C. For example, the base 111A is fixed on a mounting table (not shown) on which the terminal crimping device 100 is placed. The anvil support 111B and the transmission support 111C are fixed on the base 111A. The transmission portion support 111C is disposed rearward (to the right of the drawing in FIG. 11) and above (upward in the drawing of FIG. 11) with respect to the anvil support 111B. Specifically, the transmission unit support 111C from base 111A behind the anvil support 111B and standing portion 111C ₁ erected upward, held in the upper portion of the standing portion 111C ₁ having a ram support portion 111C _2, a. Ram support portion 111C ₂ is a support portion for supporting the ram 114A, described later, arranged at a predetermined interval above the anvil support 111B.

  The first mold 112 and the second mold 113 are arranged with a space in the vertical direction, and the crimp terminal 1 and the end of the electric wire 50 are sandwiched between the first and second molds 112 and 113 so that the crimp terminal 1 is connected to the electric wire 50. 12 is a pressure-bonding mold that is pressure-bonded to the end of the wire (FIG. 12). The first mold 112 is formed with two lower molds, and includes a first anvil 112A and a second anvil 112B as the lower mold. The second mold 113 is formed with two upper molds, and has a first crimper 113A and a second crimper 113B as the upper mold. The first anvil 112A and the first crimper 113A are arranged to face each other in the vertical direction, and the U-shaped core wire crimping portion 12A is crimped to the core wire 51 at the distal end by narrowing the interval between them. Let Further, the second anvil 112B and the second crimper 113B are arranged so as to face each other in the vertical direction, and the U-shaped crimping portion 12B is crimped to the sheath 52 by narrowing the interval between them. Let

  The drive device 103 transmits the power to the power transmission mechanism 114 to narrow the space between the first anvil 112A and the first crimper 113A and the space between the second anvil 112B and the second crimper 113B at the time of such crimping. After crimping, the space between the first anvil 112A and the first crimper 113A and the space between the second anvil 112B and the second crimper 113B are widened. In this example, by moving the second mold 113 up and down relative to the first mold 112, the first crimper 113A and the second crimper 113B are simultaneously moved up and down relative to the first anvil 112A and the second anvil 112B. . However, the first anvil 112A, the second anvil 112B, the first crimper 113A, and the second crimper 113B may be molded bodies that are individually molded. In this case, the driving device 103 and the power transmission mechanism 114 may be the first The crimper 113A and the second crimper 113B may be configured to move up and down separately. In this example, after the crimping of the core crimping part 12A is started by the first anvil 112A and the first crimper 113A, the crimping of the covering crimping part 12B by the second anvil 112B and the second crimper 113B is started.

  The power transmission mechanism 114 of this embodiment transmits the power output from the drive device 103 to the first crimper 113A and the second crimper 113B. As shown in FIG. 11, the ram 114A, the ram bolt 114B, and the shank 114C.

Ram 114A is a movable member which is vertically movably supported relative to the ram support portion 111C _2. A second mold 113 is fixed to the ram 114A. Therefore, first crimper 113A and the second crimper 113B can be moved up and down with respect to the ram support portion 111C ₂ become ram 114A integrally. For example, the ram 114A is formed in a rectangular shape. A female screw part (not shown) is formed in the ram 114A. The female screw portion is formed on the inner peripheral surface of the vertical hole formed from the inner side of the ram 114A toward the upper end surface.

The ram bolt 114B has a male screw portion (not shown) that is screwed into the female screw portion of the ram 114A. Therefore, the ram bolt 114B may be moved up and down with respect to the ram support portion 111C ₂ become ram 114A integrally. Further, the ram bolt 114B has a bolt head 114B ₁ positioned above the male screw portion. Its bolt head 114B _1, the female screw portion (not shown) is formed. As the female threaded portion is formed on the inner peripheral surface of the vertical bore formed toward the upper end surface from the inside of the bolt head 114B _1.

Shank 114C is a cylindrical hollow member, having respective male screw portion 114C ₁ and the connecting portion to an end portion (not shown). Male thread portion 114C ₁ of the shank 114C is formed on the lower side of the hollow member, it is screwed into the female screw portion of the bolt head 114B ₁ of the ram bolt 114B. Thus, the shank 114C can be moved up and down with respect to the ram support portion 111C ₂ become ram 114A and ram bolt 114B integrally. The connection unit is connected to the driving device 103.

The drive device 103 includes a drive source (not shown) and a power conversion mechanism (not shown) that converts the drive force of the drive source into power in the vertical direction. The connecting portion of the shank 114C is coupled to the output shaft of the power conversion mechanism. Therefore, first crimper 113A and the second crimper 113B is the output of the drive unit 103 (the output of the power conversion mechanism), vertically with respect to the ram support portion 111C ₂ integral with the ram 114A and ram bolt 114B and a shank 114C Move. As the drive source, an electric actuator such as an electric motor, a hydraulic actuator such as a hydraulic cylinder, a pneumatic actuator such as an air cylinder, and the like are applicable.

Here, the relative position in the vertical direction of the second crimper 113B for the relative position in the vertical direction of the first crimper 113A for the first anvil 112A second anvil 112B is female screw portion of the bolt head 114B ₁ and the shank 114C male by adjusting the screwing amount of the screw portion 114C _1, it can be varied. Nut 114D is screwed into the male screw portion 114C ₁ of the shank 114C above the ram bolt 114B, it forms the function of a so-called lock nut with a female screw portion of the bolt head 114B _1. For this reason, the nut 114D can fix the first crimper 113A and the second crimper 113B at the relative position by tightening the nut 114D toward the ram bolt 114B after the adjustment of the relative position is completed.

The first anvil 112A and the second anvil 112B are formed with concave surfaces 112A ₁ and 112B _{1 which} are recessed downward at the upper ends of the respective upper anvils (FIG. 12). Each concave surface 112A ₁ , 112B ₁ is formed in an arc shape in accordance with the shape of each bottom portion 14 of the U-shaped core wire crimping portion 12A and the U-shaped covering crimping portion 12B. In the crimping machine 110, the respective concave surfaces 112A ₁ and 112B ₁ are the crimping positions. Crimp terminal bottom 14 has been supplied in the bottom 1, the bottom 14 of the core wire crimping portion 12A is placed on the concave surface 112A ₁ of the upper end of the first anvil 112A, bottom 14 of the insulation crimp portion 12B is a second It is placed on the concave surface 112B ₁ of the upper end of the anvil 112B. The first mold 112 is supported by the anvil support 111B with the concave surfaces 112A ₁ and 112B ₁ exposed upward, respectively.

The first crimper 113A and the second crimper 113B are respectively formed with concave portions 113A ₁ and 113B _{1 that} are recessed upward (FIG. 12). Each recess 113A _1, 113B ₁ are disposed opposite in the vertical direction with respect to each of the concave surfaces 112A _1, 112B ₁ of the first anvil 112A and the second anvil 112B. Each recess 113A _1, 113B ₁ includes a first and second wall surfaces 115 and 116 that face each other, and the third wall 117 which connects the upper end of the first and second wall surfaces 115 and 116, a. Each concave portion 113A ₁ , 113B ₁ has the first barrel piece portion 15 and the second barrel portion 15 and the second barrel piece portion 15 in contact with the first to third wall surfaces 115, 116, 117 in contact with the first barrel piece portion 15 and the second barrel piece portion 16. The barrel piece 16 is crimped while being wound around the end of the electric wire 50. Each recess 113A _1, 113B ₁ is formed to allow such crimping operation. In the present embodiment, the short first barrel piece 15 is first wound from the tip 15a side to the electric wire 50 side, and then the long second barrel piece portion 16 is drawn to the electric wire 50 side while It winds around the barrel piece 15 and the electric wire 50. FIG. 13 is a diagram showing a crimping process of a portion (crimped portion with respect to the coating 52) cut along line Y3-Y3 in FIG. In the figure, for convenience of illustration, the first and second molds 112 and 113 are omitted.

  The crimping terminal 1 thus crimped by the crimping machine 110 is separated from the connecting piece 31 by the terminal cutting machine 120. The terminal cutting machine 120 sandwiches and cuts the connecting portion 32 of the crimping terminal 1 supplied to the crimping position between the two terminal cutting portions, and performs the separation simultaneously with the progress of the crimping process. The terminal cutting machine 120 is disposed in front of the second anvil 112B (left side in FIG. 11).

  The terminal cutting machine 120 is well known in this technical field, and includes, for example, a terminal cutting body 121, a pressing member 122, and an elastic member 123. The terminal cutting body 121 is disposed so as to be slidable in the vertical direction along the front surface of the second anvil 112B. In this terminal cutting machine 120, the terminal cutting part 121 and the 2nd anvil 112B are each formed with the terminal cutting part. The pressing member 122 is fixed to the ram 114A and moves up and down integrally with the ram 114A. The pressing member 122 is disposed above the terminal cut body 121 and descends to push down the terminal cut body 121. The elastic member 123 applies an upward urging force to the terminal cut body 121, and includes a spring member or the like. When the pressing force from the pressing member 122 is released, the elastic member 123 returns the terminal cutting body 121 to the initial position in the vertical direction. In this terminal cutting machine 120, the pressing member 122 descends with the lowering of the second mold 113 during the crimping process, and the terminal cutting body 121 is pushed down, so that the connecting portions 32 are cut at the respective terminal cutting portions and crimped. The terminal 1 is disconnected from the terminal chain 30.

Here, on the outer wall surface side of the tip 15a, 16a of each of the first barrel piece 15 and the second barrel piece 16, the plate of the tips 15a, 16a from the bottom 14 side toward the end face side of the tips 15a, 16a. It is desirable to provide tapered surfaces 15a ₁ and 16a ₁ that reduce the thickness (FIG. 13). The tapered surfaces 15a ₁ and 16a ₁ may be formed by a pressing process of the electric wire connecting portion 12. The crimp terminal 1 of this embodiment can increase the space | interval of the front-end | tip 15a and the 1st wall surface 115 by such a taper-shaped front-end | tip 15a, 16a, and makes the end surface side of the front-end | tip 16a inserted between them thin. Therefore, the contact between the end surfaces of the tips 15a and 16a in the crimping process is suppressed, and the second barrel piece 16 is easily inserted between the first barrel piece 15 and the first wall surface 115. Therefore, the crimp terminal 1 can perform a desired crimping process, and can also improve water-stopping performance by the water-stopping member 20.

  In addition, since the second barrel piece 16 covers the tip 15a of the first barrel piece 15 covering the coating 52 from the outside in the covered crimp portion 12B after the completion of the crimping, the water stop member 20 is stuck. Assuming that this is not done, a space surrounded by the end surface, the inner wall surface of the second barrel piece 16, and the outer wall surface of the covering 52 is formed on the end surface side of the tip 15 a of the first barrel piece 15. . And the space | interval between the inner wall surface of the 2nd barrel piece part 16 and the outer wall surface of the coating | cover 52 spreads so that the plate | board thickness of the front-end | tip 15a of the 1st barrel piece part 15 becomes thick, and the capacity | capacitance becomes large. . For this reason, in this covering crimping part 12B, it is difficult to fill the space with the water-stopping member 20 as the capacity of the space is large, and there is a possibility that the water-stopping property is lowered. Here, for convenience, the space is referred to as a “water-stop member filling space”.

Therefore, in this embodiment, by reducing the space between the inner wall surface of the second barrel piece 16 and the outer wall surface of the covering 52, the capacity of the water stop member filling space is reduced, and this water stop member filling is performed. The space can be filled with the water stop member 20. More specifically, the inner wall surface side of the distal end 15a of the first barrel piece 15 in the coating crimping portion 12B, a tapered surface 15a ₂ of the thickness of the tip 15a is reduced toward the end face side of the tip 15a from the bottom portion 14 side Provided (FIGS. 9 and 13). Its taper surface 15a ₂ may be formed in the pressing process of the wire connection portion 12. This taper surface 15a ₂ is the distance between the inner wall surface of the second barrel piece 16 and the outer wall surface of the coating 52 on the end face side of the tip 15a of the first barrel piece 15 in the coated crimp portion 12B after completion of the crimping. Therefore, the capacity of the water stop member filling space can be reduced. For this reason, in the covering crimping portion 12B after the completion of the crimping, the filling amount of the waterstop member 20 in the waterstop member filling space is reduced, so that the filling efficiency of the waterstop member 20 in the waterstop member filling space is increased { That is, the water stop member 20 (particularly the third water stop portion 26) easily flows into the water stop member filling space during the crimping process}, and the water stop member filling space is easily filled with the water stop member 20.

  Here, the third water stop region 23 is between the region (first region) filled in the water stop member filling space and the inner wall surface of the tip 15a of the first barrel piece 15 and the outer wall surface of the covering 52. And the region (second region) filled between the outer wall surface of the tip 15a and the inner wall surface of the second barrel piece 16 are the end surface of the tip 15a and They are connected to each other around the periphery (FIG. 9). Therefore, in the crimp terminal 1 of the present embodiment, first, the water-stopping member 20 filled in the third region suppresses the intrusion of water into the inside of the coated crimp portion 12B, so that the water can pass through the third region by any chance. Even if it has entered, the water stopping member 20 filled in the first region or the second region causes water to enter the inside of the covering crimping portion 12B (more specifically, between the second barrel piece 16 and the covering 52). Infiltration can be suppressed. As described above, the crimp terminal 1 of the present embodiment can improve the water stoppage between the second barrel piece 16 and the coating 52.

Further, as described above, the crimp terminal 1 is provided with the tapered surface 15a ₁ on the outer wall surface side of the tip 15a for suppressing contact between the end surfaces of the tips 15a and 16a. The insulation crimp portion 12B after the crimping is completed, that the tapered surface 15a ₁ of the outer wall surface is present, be further thinned taken to toward the plate thickness of the tip 15a on the end face side of the distal end 15a Since the two tapered surfaces 15a ₁ and 15a ₂ are combined, the capacity of the water stop member filling space can be further reduced. Therefore, the crimp terminal 1 of the present embodiment can further increase the filling efficiency of the water stop member 20 with respect to the water stop member filling space, so that the first to third regions connected to each other are easily formed. The water stoppage between the second barrel piece 16 and the coating 52 can be further improved.

  Further, the capacity of the water stop member filling space on the end face side of the tip 15a can be reduced by increasing the pushing amount of the second barrel piece 16 constituting the wall surface of the water stop member filling space toward the covering 52. . Therefore, it is desirable that the second barrel piece 16 of the present embodiment has a thinner plate thickness at the portion forming the wall surface of the water-stopping member filling space than at the periphery thereof. Thereby, the part adjacent to said water stop member filling space in the 2nd barrel piece part 16 becomes easy to deform | transform at the time of a crimping process compared with the other part of the 2nd barrel piece part 16. FIG. Therefore, the crimp terminal 1 of the present embodiment can increase the amount of pushing toward the coating 52 side during the crimping process in the portion forming the wall surface of the water-stopping member filling space in the second barrel piece 16, so that the tip 15 a The capacity | capacitance of the water stop member filling space of the end surface side of this can be reduced, and the filling amount of the water stop member 20 in this water stop member filling space can be reduced. Accordingly, the crimp terminal 1 can easily fill the water stop member filling space with the water stop member 20 through the crimping process, so that the stop between the second barrel piece 16 and the covering 52 can be prevented. The aqueous property can be further improved.

For example, the second barrel piece 16 is provided with a recess in a portion (which may be the outer wall surface side or the inner wall surface side) that forms the wall surface of the water stop member filling space, so that the plate thickness of the portion is made thinner than the surroundings. That's fine. In addition, here, on the inner wall surface side of the second barrel piece 16 in the coated crimping portion 12B and between the portion forming the wall surface of the water stop member filling space and the end surface of the tip end 16a, the end surface side is directed. It may be provided a taper surface 16a ₂ in which the plate thickness becomes thinner as you (FIGS. 9 and 13). In this case, after completion of the crimping, the tapered tip 15a and the tapered portion of the second barrel piece 16 overlap each other. In this crimp terminal 1, the taper-shaped tip 15 a reduces the capacity of the water stop member filling space on the end surface side of the tip 15 a and the pushing amount to the coating 52 side by the tapered portion of the second barrel piece 16. Since the capacity of the water-stopping member filling space can be reduced with an increase in the amount of The member filling space can be filled with the water stop member 20 more easily, and the water stop between the second barrel piece 16 and the coating 52 can be further improved.

DESCRIPTION OF SYMBOLS 1 Crimp terminal 10 Terminal metal fitting 11 Terminal connection part 12 Electric wire connection part 12A Core wire crimp part 12B Cover crimp part 12C Connection crimp part 13 Connection part 14 Bottom part 15 1st barrel piece part 15a Tip 15a ₂ taper surface 16 2nd barrel piece part 16a Tip 16a ₂ taper surface 20 water stop member 21 first water stop region 22 second water stop region 23 third water stop region 24 first water stop portion 25 second water stop portion 26 third water stop portion 50 electric wire 51 core wire 52 Coating

Claims (3)

A terminal connection portion that is electrically connected to the counterpart terminal, a wire connection portion that is electrically connected by crimping to the end of the electric wire placed on the inner wall surface side, and the terminal connection portion And a connecting portion for connecting the wire connecting portion, the wire connecting portion extending from one end of the bottom portion, the bottom portion on which the end portion of the wire is placed during the crimping process, The inner first barrel piece that is wound around the end of the wire and the outer end of the wire that extends from the other end of the bottom longer than the first barrel piece and winds around the end of the wire and the first barrel piece. A core wire crimping portion that is partitioned into a second barrel piece and is crimped to the core wire at the tip of the electric wire, a coating crimping portion that is crimped to the coating of the electric wire, and the core wire crimping portion and the coating crimping portion are connected. And a connecting crimping section for crimping to the end of the electric wire. And the terminal fitting that has been,
Affixed to the inner wall surface of the electric wire connecting portion before the crimping process is performed, and after completion of the crimping process, between the outer wall surface of the first barrel piece and the inner wall surface of the second barrel piece. A first water stop region that suppresses intrusion of water between the electric wire connecting portion and the core wire, between the electric wire connecting portion and the core wire from the terminal connecting portion side rather than the tip position of the core wire A second water stop region for suppressing water ingress, and a third water stop for suppressing water intrusion between the wire connecting portion and the core wire from between the inner wall surface of the cover crimping portion and the cover. A water-stop member forming an area;
With
The inner wall surface at the tip in the extending direction of the first barrel piece in the coated crimp portion has a tapered surface whose plate thickness decreases from the bottom side toward the end surface of the tip,
A part of said 3rd water stop area | region is connected between the end surface side of the said front-end | tip in the said front-end | tip of the said 1st barrel piece part, the said inner wall surface side, and the said outer wall surface side, The crimping | compression-bonding characterized by the above-mentioned Terminal.   The second barrel piece portion is configured such that a plate thickness of a portion adjacent to a space between the second barrel piece portion and the covering on the end face side of the tip of the first barrel piece portion is made thinner than its surroundings. The crimp terminal according to claim 1, wherein:   The inner wall surface side of the second barrel piece portion in the covering crimping portion is directed to the end surface side from the portion adjacent to the space to the end surface of the tip in the extending direction of the second barrel piece portion. The crimp terminal according to claim 2, wherein a taper surface having a plate thickness that decreases with increasing thickness is provided.

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